Sash lock



Aug. 23, i949, F. GRANBERG ZAl SASH LOCK Filed NOV. 29, 1945 2 Sheets-Sheet 1 ug- 239 B949. F. GRANBERG ZSE@ SASH LOCK Filed Nov. 29, 1945 Y 2 sheets-sheet 2 ffii/Ivn Zi-:66K rarfefy.

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Patented Aug. 23, 1949 UNITED STATES rATENT OFFICE 2,480,016 sAsH 1.00Kl

Fred Granberg, Chicago, 111. Application November 29, 1945, Serial No. 631,706

` s claims.

The present invention relates to a locking device for a window, and particularly to a locking device wherein the bolt is automatically held open while the window is being raised and automatically moved to locking position when the window is closed.

An object of the invention is to provide an automatic window lock by adding parts to the conventional locks now in use on windows in millions o f homes in this country. This lock consists of a rotatable bolt and an overhanging catch and is described in detail hereinafter.

Another object of the invention is to provide a window lock which will be automatically held open upon release of the lock so as to permit the operator to use both hands in opening the window. A species of a lock of this type is shown in my co-pending application, Serial No. 558,359, led October 12, 1944, now Patent No. 2,421,196, while a second species of such a lock is described and claimed herein. In my earlier patent, which contains claims generic to both inventions, the conventional bolt means above mentioned was employed with certain devices added thereto, but that invention required the use of a specially constructed catch member. The present member adds different devices to the conventional bolt or latch member and requires no change whatsoever in the conventional catch member. From the manufacturing standpoint especially, my present invention is a great improvement over any automatic locking means heretofore developed as such means always required the use of specially constructed bolts and catches.

Further objects, advantages and features of the invention will be apparent from the following specification and the drawings, in which:

Fig. 1 is a top plan View of the lock in locked position;

Fig. 2 is a sectional View taken on the line 2--2 of Fig. 1

Fig. 3 is a bottom plan view of the bolt mountying in locked position; K

Fig. 4 is a top plan view, partly in section of the lock with the catch withdrawn prior to raising;

Fig. 5 is a view taken on the line 5-5 of Fig. 4, but with parts of the catch broken away;

Fig. 6 is a top plan view of the lock after the window has been raised;

Fig. 7 is a front elevational View of the lock partially broken away showing the position of the members just prior to full closing of the window; and

Fig. 8 is a bottom plan view of the bolt mounting in unlocked position,

In the embodiment oi the invention shown in the drawings, I0 represents the catch plate member provided with the customary arcuate raised portion II having the edge or shoulder IIa at the underside of the plate I5 one'end and having an overhanging lip I2, the other end of the portion II being curved further inwardly at I3 to provide a surface against which the edge of the other check rail will strike if the rails are too close together upon closing. The catch member is adapted to be attached to the upper side of the check rail on the upper side of the out-er sash member vof the window by two screws which extend through the openings I4 in the member.

The latch or bolt member mounting plate I5 is adapted to be attached to the upper side of the check rail of the lower inner sash member by two screws extending through the openings I6 and has mounted on it a rotatable plate or latch memberv I'I by means of a rivet or brad I8. The plate I1 is provided' with a rounded handle I9 for turning the plate, said handle being on the end of the latch proper 20 which comprises an upwardly extending ange on an edge of the plate I1 and which inclines toward its other end so that when in locking position, it will wedge under the lip I2 and hold the two check rails ltightly together.

The latch plate I5 has a peripheral, downwardly extending 'flange I5a which rests upon the check rail and forms chamber 2l in which is a circular disk 22 secured to the rivet or brad I8 on the under side of the plate I5. Washers are usually inserted around the brad and between the top of the disk 22 and the bottom of the plate I5. as shown.

The structure so far set forth is standard equipment now installed on millions of windows in this country. The present invention comprises parts which may be added to such equipment to provide automatic operation thereof and will now be described.

On the disk 22 is Welded, or otherwise secured, a downwardly projecting stop member 23 and on is securely attached a bracket 24 to which is secured one end of a spring arm 25 adapted to engage the stop member 23 and which tends to force or urge said member (and the disk 22, brad I8, and latch member I'l) in a counterclockwise dir-action as viewed from underneath. The member 23 and spring arm 25 are so positioned that the force exerted by the spring remains constant. See Figs. 3 and 8. As the stop is moved against the spring, the leverage constantly changes so that there is no substantial change in tension as the parts are moved to and from the position shown in these figures. v

On the top of the plate #l5 `is mounted a cylindrical housing 26 open ateach end and with one side projecting beyond the rear end of the plate I5 and terminating in a`v ilange 21a. In this housing is a stud 28 to the rear end' of which is securely attached a member 29 which projects outwardly beyond the housing 26 and then rearwardly and then at about a 45 angle forwardly to a point where it may contact the rear end of the latch member 20 when it has been manually turned in a counter-clockwise direction for releasing the lock. When the window is locked, the member 29 is cocked at an angle to the horizontal and with its lower edge resting on the upper edge of the flange, forming the lock member proper 20. The head 28a of the stud 28 provides the front wall of the housing which also contains a spring 30 around the stud 28 and connected to the head 28a and to the casing 26 in such manner that it tends to twist clockwise and pull the member downward toward the plate I and backward toward the front of the housing. The stud. of course, is freely rotatable in Athe housing, except for the spring.

In operation, the window'is locked as shown in Figs. 1 and 2 with the bolt 20 under the catch l2 and the member 29 resting on the ilange vof the holt 20. To raise the window, the bolt is turned counter-clockwise until its end'is beyond the member 29 which then moves downward by reason of the action of the spring 30 and acts as a stop to prevent the return of the `bolt which would otherwise occur upon release of the bolt handle by reason of the spring 25 pressing against the stop 23. The spring '25 is stronger than the spring 30 and its pressure tends Vto force the member 29 and stud 28 backward toward the flange 27a. The forward edge Ila of the catch member, however, is adjacent to the rear part of the member 29 and prevents such movement while the window is closed. The handle is then released and the operator is free to use both hands to raise the window. As the window is raised the spring 25 rotates the `bolt 2o suciently to force the member `29 and its associated parts backward until the member contacts the flange Ela and the member 29 projects over the end Ha of the catch member H. The member 29, however, still acts to hold lthe bolt (see Fig. 6). Now when the window is lowered the member 29 will contact `this edge Ha and its outer end will be forced upwardly to release the bolt and permit the spring 25 to rotate it to locked position under the catch l2. At the same time, the spring 30 will retract the stud 28 into the housing and pull with it the member 29 until said member strikes the end of the housing preventing further movement thereof. The member 29 is now clear of the edge lla of the catch member H and the device is set for reopening when desired.

Having described my invention in considerable detail as related to one embodiment of the same it is my intention that the invention be not limited to these details but rather be construed broadly within its spirit and scope as set out in the accompanying claims.

I claim:

1. An automatic locking attachment for a conventional check rail window lock wherein a rotatable bolt is adapted to be engaged by a lip on a plate on the other check rail comprising: automatic means for moving the bolt to locked position; a slidable and rotatable member adjacent to the bolt; means to rotate said member into position to prevent locking of the bolt when the bolt has been manually unlocked; means to move said member and bolt, upon opening of the window, to a position where the member is over the plate on the other check rail so that when the window-is closed the member will contact the plate and be rotated to release the bolt; and means for sliding the member to its former position.

2. The device claimed in claim 1 wherein the member is an arm attached to a stud positioned in a housing.

3. The device claimed in claim 1 wherein the means for rotating the member and for sliding the member is a single spring.

4. The device claimed in claim l including means for limiting the sliding movement of the member.

5. An automatic locking attachment for a conventional check rail window lock wherein a rotatable bolt member is adapted to be engaged by a lip forming a part of a plate member on the other check rail, comprising: automatic means for moving the bolt to locked position; a stop member adjacent the bolt, this stop member being both rotatable and axially slidable; means for moving said stop member into position to prevent locking of the bolt member when the bolt member has been manually unlocked; means on said plate member for displacing said stop member to release the bolt member when the window is closed; and spring means connected to said stop member for moving said stop member out of contact with said displacing means when the window is closed.

6. An automatic locking attachment for a conventional check rail window lock wherein a rotatable bolt member is adapted to be engaged by a lip forming a part of a plate member on the other check rail, comprising: automatic means for moving the bolt to locked position; a stop member adjacent Ythe bolt rotatable about an axis and movable along said axis; means to rotate said stop member about said axis into position to prevent locking of the bolt member when the bolt member has been manually withdrawn; means for moving the stop member along said axis to a position over the plate member; means on the plate member to engage the stop member and rotate it about said axis to release the bolt member when the window is closed; and means for moving the stop member along said axis and out of contact with said displacement means `when the window is closed.

7. An automatic locking attachment for a conventional check rail window lock wherein a rotatable bolt is adapted to be engaged by a lip on a plate on the other check rail comprising: a raised portion on said plate; automatic means for moving the bolt to locked position: a .rotatable and axially slidable member adjacent the bolt, the axis oi' rotation thereof being transverse to said check rail; means to move said member into position to prevent locking of the bolt when the bolt has been manually unlocked, said member being so constructed and arranged that upon closing of the window it will contact said raised portion of the plate on the kother check rail and be rotated to release the bolt; and spring means connected to said stop member for moving it out of contact with said raised portion when the windovgis closed.

8. In a window locking device having a bolt assembly adapted to be secured to one sash of a window and a catch assembly adapted to be secured to the opposite window sash, the combination of a catch assembly including a relatively at mounting plate, a hook shaped catch adapted to be engaged Aby the bolt of the bolt assembly, and a latch tripping surface above the plane of the mounting plate and between the mounting plate and the catch; a bolt assembly comprising a relatively flat mounting plate, an internal chamber for -a spring, a locking bolt in the form of a rotatable cam pivotally mounted on said mounting plate, a spring housed within the spring chamber of the mounting plate and connected to the rotatable bolt to bias it toward engaged position, and a manually operatable handle on the locking bolt to facilitate retraoting said bolt against the force of the biasing spring: together with a shiftable latching device including a latch shaft and a latching arm carried by said latch shaft; said shaft being rotatably mounted on the bolt mounting plate and longitudinally slldable thereon, so that the latch arm is positioned to swing into the path of movement of the locking bolt and to extend to a position wherein 6 it overhangs the latch tripping surface of the catch assembly; whereby the latch will be actuated to release the locking bolt on closing movement of the Window sash.

FRED GRANBERG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 926,899 Roy July 6, 1909 1,077,312 Sloan Nov. 4, 1913 1,651,048 Talbot Nov. 29, 1927 

